Shuttle-motion for looms.



No. 860,863. PATENTED JULY 23, 1907.-

' H. L. GOODWIN.

SHUTTLE MOTION FOR LOOMS.

APPLICATION FILED OCT. 5. 1904.

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No. 860,863. PATBNTED JULY 23, 1907.

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APPLICATION FILED OCT. 5, 1904. k

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UNITED STATES PATENT OFFTG.

HARRY L. GOODWIN, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO GOODWIN PICKER COMPANY, OF BOSTON,

LUMBIA.

MASSACHUSETTS, A CORPORATION OF THE DISTRICT OF CO- SHUTTLE-MOTION FOR LOOMS.

Specification of Letters Patent.

Application filed October 5, 1904. Serial No. 227,248.

To all whom it may concern:

Be it known that I, HARRY L. GOODWIN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Shuttle-Motions for Looms, of which the following is a specification.

One object of the invention is to provide a shuttle motion for looms in which the striking point of the picker shall be certain to have a positively straight movement parallel with the line of movement of the shuttle.

In many of the forms of mechanism heretofore used in which it has been sought to secure a parallel movement, the result has been merely to secure a parallel movement of the upper end of the picker stick, or else a parallel movement of that point on the picker stick which is in horizontal alinement with the striking point of the picker when the stick is in a vertical position, but owing to the fact that the picker projects from the face of the stick the striking point is at some distance out from the face of the stick. It therefore results that if the mechanism is so constructed that the point on the stick which is in alinement with the striking point when the picker stick is in a vertical position is caused to move in a parallel line with the shuttle, then the striking point on the picker will be caused to dip downward or move in a downward incline with relation to the line of movement of the shuttle instead of moving parallel with the shuttle.

Further, the guide mechanism for the picker stick is usually constructed on the assumption that the shuttle race is parallel with the lay rock shaft and that if the loom stands on a level floor the lay beam will be in ahorizontal position, and that the shuttle will move in a horizontal line; and that if the floor is not level so that the loom stands on an inclined surface, the shuttle race is similarly inclined and therefore that the line of movement of the picker will be correspondingly inclined or declined. It sometimes happens however that the machines are not constructed with mommy and that the lay beam and lay rock shaft are not parallel with each other. In such case, if no provision is made for adjusting the fulcrum of the picker stick to compensate for the irregularity or unevenness in construction of the frame or non parallelism of the lay rock shaft andthe lay beam, and if the guide mechanism is constructed to cause the picker to move in a parallel path with the shuttle when attached to a loom accurately constructed, it will not move in a parallel line when attached to a loom having the inequalities of construction above noted.

One object of the present invention is to provide means for adjusting the fulcriun according to the inequalities in the relation of the lay beam to the lay rock shaft.

Another feature of the invention relates to the slow down mechanism for. retarding the movement of the picker stick and gradually stopping the shuttle on the return stroke. A

The invention will now be fully described, reference being had to the accompanying drawings, and the novel features thereof will be particularlypointed out in the claims at the close of the specification.

In the draWings,Figure 1 is a front elevation of a machine, partly broken away, showing a portion of the lay beam and frame, picker stick and guide bracket, and lug strap and connections. Fig. 2 is a side elevation viewed from the right hand of Fig. 1. Fig. 3 is an enlarged side elevation in detail showing the portion of the picker stick and holder and bracket and fulcrum stud. Fig. 4 is an end view of Fig. 3. Fig. 5 is a vertical central section of the parts shown in Fig. 3. Fig. 6 is an enlarged section on line 66 of Fig. 1 showing the slow down device.

1 represents the frame, 2 the lay beam, and 3 the lay rock shaft, the mechanism for operating the lay beam and the lay rock shaft being omitted as not forming a part of the present invention, but may be of ordinary form.

Mounted on the lay rock shaft 3 is the guide bracket 4. Formed in the guide bracket 4 are a vertical guide slot 5 and a curved guide slot 6. The picker stick '7 is preferably provided with a holding plate or reinforce box 8. A pivot bolt 9 passes through an elongated slot 10 in the holder 8 and through a similar elongated slot 10 in the picker stick and through the vertical slot 5 in the bracket 4 and forms a fulcrum for the stick. Suitable means are provided to clamp the bolt 9 in its adjusted position in the elongated slot 10 so that the bolt will not slip with relation to the stick when the stick is in action, but will not interfere with the movement of the bolt in the guide slot. The means shown for thus securing the bolt 9 are as follows. with a head 12 on the outer end which bears against the outer face of the bracket. The portion of the bolt which engages with the guide slot and a short portion beyond is of larger diameter than the remaining portion, thus forming a shoulder 13. The hole through the holder 8 is large enough for the passage of the reduced portion of the bolt but smaller than the larger portion so that the holder may be jammed up against the shoulder 13 without binding on the guide plate. In the end of the belt which projects through the picker stick is a washer 14, a nut 19, and a nut lock 18. Preferably, on the portion of the bolt which engages the vertical slot 5 there is a roller 17 to reduce friction.

The preferred form of nut lock is as follows. An unthreaded lock sleeve 18 whose opening flares toward the outer end is formed with its interior diameter at its inner end large enough to go over the threaded end of The bolt is formed the bolt, the interior diameter at the outer end being greater than that of the bolt, thus forming a wedge chamber tapering inwardly. The outer portion of the interior of the said sleeve 18 is polygonal in cross section, corresponding with the number of sides of the nut 19. The nut 19 is tapered on its exterior from the outer end toward the inner end and-is small enough at its inner end to go inside of the outer end of the sleeve 18 but not to pass entirely through. It is split on one side as at 20 to permit slight compression and expansion. The nut with its smaller end entered into the sleeve is set up until the sleeve 18 binds firmly against the bracket 4 and holds the bolt in its adjusted position relative to the slot 10. The nut being polygonal etc. will not turn except with the sleeve.

A bolt 21 passes through a hole in the holder 8, a hole in the stick 7 and through the guide slot 6 and is provided with a washer 23, a nut 24 and locking sleeve 25 and antifriction roller of a similar construction to those already described.

The location of the elongated slot 10 with relation to the upper bolt slot and the two guide slots is such that under normal conditions the lower or fulcrum bolt 9 should be clamped in the middle of the elongated slot 10 so as to allow for adjustment in both directions for abnormal conditions in construction.

The vertical guide slot 5 is so placed that when the picker is in its vertical position as shown in Fig. 1 with the bolt 9 in the lower part of the vertical slot 5 the striking point of the picker 15 will'be in line with the line of movement of the point of the shuttle 16. The vertical guide slot 5 and the curved guide slot 6 are so constructed and relatively placed that when the fulcrum bolt is clamped in that position in relation to the elongated slot 10 which is intended for normal conditions, that is when the lay beam is parallel with the lay rock shaft and the machine stands level on the floor, so that the path of movement of the shuttle is in a horizontal line, the striking point of the picker will move positively in a horizontal line as represented by the middle dotted line 26.

If the machine constructed for normal conditions is placed on a floor which has a slight inclination so that the entire machine partakes of the same inclination, then the shuttle and the striking point of the picker will still move in straight line with each other but at the inclination occasioned by the incline in the floor without the necessity of further adjustment of the bolt 9. But suppose through faulty construction the lay beam is not parallel with the lay rock shaft, and that while the lay rock shaft is parallel with the floor,

- the lay beam or shuttle race is, say, inclined from the right hand end viewed in Fig. 1 toward the left hand end at an angle equal to the angle between the middle dotted line 26 and the upper dotted line 27, then the path of movement of the point of the shuttle will be along the inclined line 27, and it is necessary to adjust the picker stick so that the striking point will also take the same upward incline. This is accomplished by adjusting the fulcrum bolt 9 to a lower position in the fulcrum slot 10 in the stick so that there will be a longer distance between the fulcrum and the guide bolt 21, the adjustment being determined by the degree of inclination required. I

If the lay beam is downwardly declined from right to left viewed in Fig. 1 with relation to the shaft, then it is necessary to give the striking point of the picker a similar line of movement and this may be done by adjusting the fulcrum bolt to a higher position in the slot 1.0, thus shortening the distance between the fulcrum bolt and the guide bolt, and giving the striking point a downward decline as indicated by the dotted line 28. A very slight change of position of the fulcrum will be sufficient to give any change in line of movement required for adapting it to ordinary imperfections in the proportions of the machine.

The dotted line positions of the picker stick show the position when the striking point moves in a horizontal line. This shows that when the striking point moves in a horizontal line, the upper end of the stick and all parts of the picker except the striking point do not move in a horizontal line. Therefore it is necessary that the construction of the slots and the adjustment shall be made solely with reference to the striking point and not with relation to the end of the stick nor of the picker as a whole, nor of the upper or lower face of the picker.

The slow down mechanism is as follows: Secured at one end to a laterally projecting portion of the bracket4 is a spring 29 which extends inward alongside of the stick 7 at an angle to its path of movement and engages the stick or rather the stickholder 8 (the stick being fast in the holder) on its backward stroke, gradually retarding it. It also binds on the holder somewhat and forms a detent which has to be overcome on the forward movement, thus reducing the shock of the initial pull by the lug strap 30. The preferred form of the spring is to make it curved slightly outward and then turned back by a sharp bow terminating in a free end, the turned back arm being that which engages the stick holder. It is also preferable to form a lug 31 on the side of the holder to take the wear of the spring and to round off the engaging corner as shown in Fig. 6.

The guide slot 6 in the plate 4 has been described as a vertical slot, meaning thereby substantially vertical, or perhaps more correctly speaking, perpendicular to the lay rock shaft. It is well understood, however, that the guide plate partakes of the general oscillatory movement of the lay beam and strictly speaking the slot is not always in a vertical position, and the word vertical is used in the specification and claims in the qualified sense above mentioned.

What I claim is:

1. A shuttle motion for looms having a picker stick and picker, a guide plate fixed with relation to the rockershaft and provided with a vertical slot and a curved guide slot fixed withrelation to the guide plate, a fulcrum stud extending from the picker stick and engaging with said vertical slot, a guide stud extending from said stick and engaging with said curved slot, an elongated slot through the stick for the fulcrum stud, means for adjusting the fulcrum stud in said slot to vary the distance between it and the guide stud, and means for securing it in its adjusted position, the said studs and slots being so formed and disposed with relation to each other and to the picker stick and picker that the line of movement of the striking point of the picker may be varied and adjusted to move according to the line of movement of the shuttle point.

2. A shuttle motion for looms having a picker stick and picker, a guide plate provided with a vertical slot and a curved guide slot, a fulcrum stud extending from the picker stick and engaging with said vertical slot, a guide stud extending curved guide slot, an elongated slot through said stick for from said stick and engaging with said said fulcrum stud, a shoulder on said stud to prevent the stick from binding on the guide plate, and means for clamping the picker stick against said shoulder whereby the fulcrum stud will be held in its adjusted position in said picker stick slot, and be permitted to move in the vertical slot in the guide plate.

3. A shuttle motion for looms having a picker stick and picker, a guide plate provided with a vertical slot and a curved guide slot, a fulcrum stud extending from the picker stick and engaging with said vertical slot, a guide stud extending from said stick and engaging with said curved guide slot, an elongated slot through said stick for said fulcrum stud, a shoulder on said stud which engages one side of the stick and prevents the stick from binding on the guide plate, a washer on said stud which bears against the opposite side of said stick, and a check nut on said stud whereby the said fulcrum stud may be clamped to the stick at any portion of said elongated slot to which it is adjusted.

4. A shuttle motion for looms having a picker stick and picker, a guide plate provided with a vertical slot and a curved guide slot, a fulcrum stud extending from the picker stick and engaging with said vertical slot, :1 guide stud extending from said stick and engaging with said curved guide slot, an elongated slot through said stick for said fulcrum stud, a shoulder on said-fulcrum stud which engages one side of the stick and a check nut on the other side by which the stick can be clamped firmly against the said shoulder, said shoulder preventing the stick from bearing against the guide plate and an anti-friction roller on said fulcrum stud which engages with the.vertical guide slot.

In testimony whereof I have affixed my signature, in presence of two witnesses.

HARRY L. GOODWIN.

Witnesses:

WILLIAM A. COPELAND, ROBERT WALLACE. 

